Browsing by Author "K.B. Bhalla"

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Search for anomalous fragments in 1.8A-GeV Ar40 reactions in nuclear emulsions
(1985) R. Bhanja; R. Joseph; S.K. Tuli; S.B. Beri; V.S. Bhatia; G. Kaur; M. Kaur; I.S. Mittra; K.B. Bhalla; A. Bharti; S. Lokanathan; S.K. Gupta; V.K. Gupta; G.L. Kaul; V. Kumar; L.K. Mangotra; Y. Prakash; N.K. Rao; S. Sankhydhar; S. Satti; G. Claesson; S. Garpman; N.Y. Herrström; B. Jakobsson; I. Lund; B. Norén; A. Oskarsson; I. Otterlund; S. Persson; M.M. Sherif; K. Söderström
Results are presented from an investigation of the mean free path in nuclear emulsion of multiply charged fragments, produced by 1.8A-GeV argon nuclei. Charge identification of 6965 fragments with charges Z2, producing 2192 secondary interactions, has been made. No dependence of the mean free path on the distance from the preceding collision is observed and thus our result is consistent with the nonexistence of anomalons. © 1985 The American Physical Society.
Search for anomalous interaction mean free paths of charge, 2≦Z≦18 projectile fragments in emulsions exposed to 1.8 A GeV40Ar ions
(Springer-Verlag, 1987) S.B. Beri; K.B. Bhalla; R. Bhanja; A. Bharti; V.S. Bhatia; G. Claesson; S. Garpman; S.K. Gupta; V.K. Gupta; N.Y. Herrstrom; B. Jakobsson; R. Joseph; G.L. Kaul; G. Kaur; M. Kaur; S. Kitroo; V. Kumar; S. Lokanathan; I. Lund; L.K. Mangotra; I.S. Mitra; S. Mookerjee; B. Norén; A. Oskarsson; I. Otterlund; Y. Prakash; S. Persson; N.K. Rao; S. Sankhyadhar; S. Satti; M.M. Sherif; K. Söderström; S.K. Tuli
40Ar-emulsion interactions are studied, to investigate the question of anomalons, in two G- 5 emulsion stacks. In about 4600 primary interactions, projectile fragments of Z≧2 for all generations have been followed until they interact or leave the stack. After careful estimation of charges of these fragments, variation of their mean free paths is studied as a function of distance from the preceding interaction. Generation effect, Nh dependence and production angle effect are investigated. In addition multi-chain events are analysed separately. Our results do not show anomalons at the 6% level and are consistent with non-occurrence of anomalons. However, this experiment is not sensitive enough to rule out anomalons (with a mfp of the order of 2 to 3 cm) produced at about 1% (or less) level. © 1987 Springer-Verlag.
Two-source emission of relativistic alpha particles in 40Ar- emulsion collisions
(1989) R.R. Joseph; I.D. Ojha; S.K. Tuli; V.S. Bhatia; M. Kaur; I.S. Mittra; S.S. Sahota; K.B. Bhalla; A. Bharti; S. Mookerjee; S. Kitroo; N.K. Rao
The emission of Z=2 projectile fragments has been studied in 40Ar-emulsion interactions at high energies ( approximately 1.8A GeV). The angular distributions of relativistic alphas could not be explained by a clean cut participant-spectator model. Therefore it is assumed that alphas were coming from two distinct sources differing drastically in their temperatures. It has been observed that the temperature required to reproduce the peak of the angular distribution is always approximately 10 MeV for different categories of events while the temperature required to reproduce the tail ranges from 50 to 70 MeV. An attempt has been made to prepare samples that are rich in events where the alphas can be ascribed to a hot emission source.